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<a href="process__credentials_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow-IPC: Core</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#include &quot;<a class="code" href="process__credentials_8hpp.html">ipc/util/process_credentials.hpp</a>&quot;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="preprocessor">#include &lt;flow/error/error.hpp&gt;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &lt;flow/common.hpp&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span> </div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceipc_1_1util.html">ipc::util</a></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>{</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="comment">// Process_credentials implementations.</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a3840b767894abdd17cf9a7b5b2dfbf3c">   28</a></span><a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a3840b767894abdd17cf9a7b5b2dfbf3c">Process_credentials::Process_credentials</a>() :</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>  <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>(0, 0, 0)</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>{</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>  <span class="comment">// That&#39;s it.</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>}</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a7794dc1a6d963cdd10928fb69008df14">   34</a></span><a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a3840b767894abdd17cf9a7b5b2dfbf3c">Process_credentials::Process_credentials</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#a0c44028a45451ebf21f6af8e806b2682">process_id_t</a> process_id_init, <a class="code hl_typedef" href="namespaceipc_1_1util.html#a6435c1b48ec8684c24ca406d1d17208e">user_id_t</a> user_id_init, <a class="code hl_typedef" href="namespaceipc_1_1util.html#a3f7d069ce0d23f73153da2e2559dc3d3">group_id_t</a> group_id_init)</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>{</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>  <span class="comment">/* I don&#39;t really want to rely on the ordering of this annoying little Linux/whatever structure,</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment">   * so just assign it manually instead of in the initializer above.</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment">   * @todo In C++20 can use the { .x = ..., .y = ... } syntax. */</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>  <a class="code hl_variable" href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">m_val</a>.pid = process_id_init;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>  <a class="code hl_variable" href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">m_val</a>.uid = user_id_init;</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>  <a class="code hl_variable" href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">m_val</a>.gid = group_id_init;</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>}</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a3840b767894abdd17cf9a7b5b2dfbf3c">Process_credentials::Process_credentials</a>(<span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp;) = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp; <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a8f507637515a11b2f7e50959a8a39ce2">Process_credentials::operator=</a>(<span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp;) = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">   47</a></span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a0c44028a45451ebf21f6af8e806b2682">process_id_t</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">Process_credentials::process_id</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">m_val</a>.pid;</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>}</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span> </div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#ac1fb8e7a5663735405ca0c0bc29163c5">   52</a></span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a6435c1b48ec8684c24ca406d1d17208e">user_id_t</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ac1fb8e7a5663735405ca0c0bc29163c5">Process_credentials::user_id</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">m_val</a>.uid;</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>}</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span> </div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#ae54faa2974b966d31678fd51b7200514">   57</a></span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a3f7d069ce0d23f73153da2e2559dc3d3">group_id_t</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ae54faa2974b966d31678fd51b7200514">Process_credentials::group_id</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">m_val</a>.gid;</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>}</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#ae4f156cfdfe0c8c5702890e5c1a37cdf">   62</a></span>std::string <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ae4f156cfdfe0c8c5702890e5c1a37cdf">Process_credentials::process_invoked_as</a>(<a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code)<span class="keyword"> const</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>  <span class="keyword">using </span>boost::lexical_cast;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>  <span class="keyword">using </span>boost::system::system_category;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>  <span class="keyword">using </span>fs::path;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>  <span class="keyword">using </span>fs::ifstream;</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>  <span class="keyword">using </span>std::ios_base;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>  <span class="keyword">using </span>std::string;</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>  <span class="comment">// using ::errno; // It&#39;s a macro apparently.</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span> </div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>  FLOW_ERROR_EXEC_AND_THROW_ON_ERROR(std::string, <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ae4f156cfdfe0c8c5702890e5c1a37cdf">Process_credentials::process_invoked_as</a>, _1);</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>  <span class="comment">// ^-- Call ourselves and return if err_code is null.  If got to present line, err_code is not null.</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span><span class="preprocessor">#ifndef FLOW_OS_LINUX</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>  <span class="keyword">static_assert</span>(<span class="keyword">false</span>, <span class="stringliteral">&quot;process_invoked_as() depends on Linux /proc semantics.&quot;</span>);</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>  path cmd_line_path(<span class="stringliteral">&quot;/proc&quot;</span>);</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>  cmd_line_path /= lexical_cast&lt;path&gt;(<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">process_id</a>());</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>  cmd_line_path /= <span class="stringliteral">&quot;cmdline&quot;</span>;</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span> </div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>  <span class="comment">/* This weird &quot;file&quot; (I believe it&#39;s really the kernel just pumping out these characters, as we read, as opposed</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span><span class="comment">   * to anything actually being stored on a drive) is argv[0], argv[1], ..., right in a row, each one NUL-terminated.</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="comment">   * So open in binary mode and just read up to NUL or end-of-file (EOF). */</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>  ifstream cmd_line_file(cmd_line_path, ios_base::binary);</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>  <span class="keywordflow">if</span> (!cmd_line_file.good())</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>  {</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>    *err_code = <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>(errno, system_category());</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>    <span class="keywordflow">return</span> string();</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>  }</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>  <span class="comment">/* From this point on we are quite tolerant; we only emit an error if we see the file in non-.good() state --</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span><span class="comment">   * but only if it&#39;s not end-of-file.  Beyond that we make zero assumptions about what might be in here (spaces?</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span><span class="comment">   * EOF without NUL? whatever!); see background in our doc header impl section.  Even an empty return value</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span><span class="comment">   * is not, in itself, an error (see our contract).</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span><span class="comment">   *</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span><span class="comment">   * Detail: We could use .getline(), but I don&#39;t want to deal with assumptions of max-length.</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span><span class="comment">   * We could use string&lt;&lt;, but isspace() has locale implications, and I just don&#39;t wanna get into all that.</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span><span class="comment">   * Reading one char at a time from a buffered stream should be fine perf-wise in this context. */</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  <span class="keywordtype">string</span> result;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>  <span class="keywordtype">bool</span> done = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>  <span class="keywordflow">do</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  {</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>    <span class="keyword">const</span> <span class="keywordtype">int</span> ch_or_none = cmd_line_file.get();</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>    <span class="keywordflow">if</span> (!(done = (!cmd_line_file.good()) || (<span class="keywordtype">char</span>(ch_or_none) == <span class="charliteral">&#39;\0&#39;</span>)))</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>    {</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>      result += ch_or_none;</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>    }</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>    <span class="comment">// else { We break out of loop. }</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>  }</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>  <span class="keywordflow">while</span> (!done);</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span> </div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>  <span class="keywordflow">if</span> ((!cmd_line_file.good()) &amp;&amp; (!cmd_line_file.eof()))</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  {</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>    assert((errno != 0) &amp;&amp; <span class="stringliteral">&quot;There had to be *some* reason file reading failed, and it wasn&#39;t EOF.&quot;</span>);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>    *err_code = <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>(errno, system_category());</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>    <span class="keywordflow">return</span> string();</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>  }</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span> </div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>  <span class="keywordflow">return</span> result; <span class="comment">// Might still be empty (unlikely though)... but as noted -- that&#39;s OK by us.</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>} <span class="comment">// Process_credentials::process_invoked_as()</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span> </div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a18c901aeeed11c91afcc6379260f02a5">  126</a></span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a0c44028a45451ebf21f6af8e806b2682">process_id_t</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a18c901aeeed11c91afcc6379260f02a5">Process_credentials::own_process_id</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>{</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>  return ::getpid();</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>}</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span> </div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a9a14d2788f0aaf91042206d5f6e5cabd">  131</a></span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a6435c1b48ec8684c24ca406d1d17208e">user_id_t</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a9a14d2788f0aaf91042206d5f6e5cabd">Process_credentials::own_user_id</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>{</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>  return ::geteuid();</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>}</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span> </div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a9c4074f11192a1193afb019d04753cd2">  136</a></span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a3f7d069ce0d23f73153da2e2559dc3d3">group_id_t</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a9c4074f11192a1193afb019d04753cd2">Process_credentials::own_group_id</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>{</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>  return ::getegid();</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>}</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span> </div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a573d6de2f257144562fd55e0772991f1">  141</a></span><a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a573d6de2f257144562fd55e0772991f1">Process_credentials::own_process_credentials</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>{</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a3840b767894abdd17cf9a7b5b2dfbf3c">Process_credentials</a>(<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a18c901aeeed11c91afcc6379260f02a5">own_process_id</a>(), <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a9a14d2788f0aaf91042206d5f6e5cabd">own_user_id</a>(), <a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a9c4074f11192a1193afb019d04753cd2">own_group_id</a>());</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>}</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a4ccdab04a79159f82d7ade8136a2eeb2">  146</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceipc_1_1util.html#ae4b4126f841ef060cdae15998e48691c">operator==</a>(<span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp; val1, <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp; val2)</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>{</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>  <span class="keywordflow">return</span> (val1.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">process_id</a>() == val2.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">process_id</a>())</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>         &amp;&amp; (val1.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ac1fb8e7a5663735405ca0c0bc29163c5">user_id</a>() == val2.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ac1fb8e7a5663735405ca0c0bc29163c5">user_id</a>()) &amp;&amp; (val1.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ae54faa2974b966d31678fd51b7200514">group_id</a>() == val2.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ae54faa2974b966d31678fd51b7200514">group_id</a>());</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>}</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span> </div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#aaf94b5903f4e0aa2f2699867dd8971ef">  152</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceipc_1_1util.html#aacbd7ee43d4912a8790a228dc7cf682d">operator!=</a>(<span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp; val1, <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp; val2)</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>{</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>  <span class="keywordflow">return</span> !<a class="code hl_function" href="namespaceipc_1_1util.html#ae4b4126f841ef060cdae15998e48691c">operator==</a>(val1, val2);</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>}</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span> </div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"><a class="line" href="classipc_1_1util_1_1Process__credentials.html#a9da92514406dc1fc61f5a561c9b5aee9">  157</a></span>std::ostream&amp; <a class="code hl_function" href="namespaceipc_1_1util.html#a28030c32e9c66f5c2862cbc6998885c7">operator&lt;&lt;</a>(std::ostream&amp; os, <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Process__credentials.html">Process_credentials</a>&amp; val)</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>{</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>  <span class="keywordflow">return</span> os &lt;&lt; <span class="stringliteral">&quot;pid[&quot;</span> &lt;&lt; val.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">process_id</a>() &lt;&lt; <span class="stringliteral">&quot;], user[&quot;</span> &lt;&lt; val.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ac1fb8e7a5663735405ca0c0bc29163c5">user_id</a>() &lt;&lt; <span class="charliteral">&#39;:&#39;</span> &lt;&lt; val.<a class="code hl_function" href="classipc_1_1util_1_1Process__credentials.html#ae54faa2974b966d31678fd51b7200514">group_id</a>() &lt;&lt; <span class="charliteral">&#39;]&#39;</span>;</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>}</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>} <span class="comment">// namespace ipc::util</span></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html">ipc::util::Process_credentials</a></div><div class="ttdoc">A process's credentials (PID, UID, GID as of this writing).</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8hpp_source.html#l00038">process_credentials.hpp:39</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a181288d97adcadedf187d08c71045854"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a181288d97adcadedf187d08c71045854">ipc::util::Process_credentials::process_id</a></div><div class="ttdeci">process_id_t process_id() const</div><div class="ttdoc">The process ID (PID).</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00047">process_credentials.cpp:47</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a18c901aeeed11c91afcc6379260f02a5"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a18c901aeeed11c91afcc6379260f02a5">ipc::util::Process_credentials::own_process_id</a></div><div class="ttdeci">static process_id_t own_process_id()</div><div class="ttdoc">Obtains the calling process's process_id().</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00126">process_credentials.cpp:126</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a3840b767894abdd17cf9a7b5b2dfbf3c"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a3840b767894abdd17cf9a7b5b2dfbf3c">ipc::util::Process_credentials::Process_credentials</a></div><div class="ttdeci">Process_credentials()</div><div class="ttdoc">Default ctor: each value is initialized to zero or equivalent.</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00028">process_credentials.cpp:28</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a573d6de2f257144562fd55e0772991f1"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a573d6de2f257144562fd55e0772991f1">ipc::util::Process_credentials::own_process_credentials</a></div><div class="ttdeci">static Process_credentials own_process_credentials()</div><div class="ttdoc">Constructs and returns Process_credentials containing values pertaining to the calling process at thi...</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00141">process_credentials.cpp:141</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a5e9f0979d5b61f4d4557d1e338871b2f"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a5e9f0979d5b61f4d4557d1e338871b2f">ipc::util::Process_credentials::m_val</a></div><div class="ttdeci">::ucred m_val</div><div class="ttdoc">The raw data. By using Linux ucred directly, we can reuse this as base for Opt_peer_process_credentia...</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8hpp_source.html#l00167">process_credentials.hpp:167</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a8f507637515a11b2f7e50959a8a39ce2"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a8f507637515a11b2f7e50959a8a39ce2">ipc::util::Process_credentials::operator=</a></div><div class="ttdeci">Process_credentials &amp; operator=(const Process_credentials &amp;src)</div><div class="ttdoc">Boring copy assignment.</div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a9a14d2788f0aaf91042206d5f6e5cabd"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a9a14d2788f0aaf91042206d5f6e5cabd">ipc::util::Process_credentials::own_user_id</a></div><div class="ttdeci">static user_id_t own_user_id()</div><div class="ttdoc">Obtains the calling process's effective user_id().</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00131">process_credentials.cpp:131</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_a9c4074f11192a1193afb019d04753cd2"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#a9c4074f11192a1193afb019d04753cd2">ipc::util::Process_credentials::own_group_id</a></div><div class="ttdeci">static group_id_t own_group_id()</div><div class="ttdoc">Obtains the calling process's effective group_id().</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00136">process_credentials.cpp:136</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_ac1fb8e7a5663735405ca0c0bc29163c5"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#ac1fb8e7a5663735405ca0c0bc29163c5">ipc::util::Process_credentials::user_id</a></div><div class="ttdeci">user_id_t user_id() const</div><div class="ttdoc">The user ID (UID).</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00052">process_credentials.cpp:52</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_ae4f156cfdfe0c8c5702890e5c1a37cdf"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#ae4f156cfdfe0c8c5702890e5c1a37cdf">ipc::util::Process_credentials::process_invoked_as</a></div><div class="ttdeci">std::string process_invoked_as(Error_code *err_code=0) const</div><div class="ttdoc">Obtains, from the OS, information as to the binary name via which process process_id() was started,...</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00062">process_credentials.cpp:62</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Process__credentials_html_ae54faa2974b966d31678fd51b7200514"><div class="ttname"><a href="classipc_1_1util_1_1Process__credentials.html#ae54faa2974b966d31678fd51b7200514">ipc::util::Process_credentials::group_id</a></div><div class="ttdeci">group_id_t group_id() const</div><div class="ttdoc">The group user ID (GID).</div><div class="ttdef"><b>Definition:</b> <a href="process__credentials_8cpp_source.html#l00057">process_credentials.cpp:57</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html"><div class="ttname"><a href="namespaceipc_1_1util.html">ipc::util</a></div><div class="ttdoc">Flow-IPC module containing miscellaneous general-use facilities that ubiquitously used by ~all Flow-I...</div><div class="ttdef"><b>Definition:</b> <a href="default__init__allocator_8hpp_source.html#l00023">default_init_allocator.hpp:24</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a0c44028a45451ebf21f6af8e806b2682"><div class="ttname"><a href="namespaceipc_1_1util.html#a0c44028a45451ebf21f6af8e806b2682">ipc::util::process_id_t</a></div><div class="ttdeci">::pid_t process_id_t</div><div class="ttdoc">Syntactic-sugary type for POSIX process ID (integer).</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00143">util_fwd.hpp:143</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a28030c32e9c66f5c2862cbc6998885c7"><div class="ttname"><a href="namespaceipc_1_1util.html#a28030c32e9c66f5c2862cbc6998885c7">ipc::util::operator&lt;&lt;</a></div><div class="ttdeci">std::ostream &amp; operator&lt;&lt;(std::ostream &amp;os, const Native_handle &amp;val)</div><div class="ttdoc">Prints string representation of the given Native_handle to the given ostream.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8cpp_source.html#l00066">native_handle.cpp:66</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a3f7d069ce0d23f73153da2e2559dc3d3"><div class="ttname"><a href="namespaceipc_1_1util.html#a3f7d069ce0d23f73153da2e2559dc3d3">ipc::util::group_id_t</a></div><div class="ttdeci">::gid_t group_id_t</div><div class="ttdoc">Syntactic-sugary type for POSIX group ID (integer).</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00149">util_fwd.hpp:149</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a6435c1b48ec8684c24ca406d1d17208e"><div class="ttname"><a href="namespaceipc_1_1util.html#a6435c1b48ec8684c24ca406d1d17208e">ipc::util::user_id_t</a></div><div class="ttdeci">::uid_t user_id_t</div><div class="ttdoc">Syntactic-sugary type for POSIX user ID (integer).</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00146">util_fwd.hpp:146</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_aacbd7ee43d4912a8790a228dc7cf682d"><div class="ttname"><a href="namespaceipc_1_1util.html#aacbd7ee43d4912a8790a228dc7cf682d">ipc::util::operator!=</a></div><div class="ttdeci">bool operator!=(Native_handle val1, Native_handle val2)</div><div class="ttdoc">Negation of similar ==.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8cpp_source.html#l00085">native_handle.cpp:85</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_ae4b4126f841ef060cdae15998e48691c"><div class="ttname"><a href="namespaceipc_1_1util.html#ae4b4126f841ef060cdae15998e48691c">ipc::util::operator==</a></div><div class="ttdeci">bool operator==(Native_handle val1, Native_handle val2)</div><div class="ttdoc">Returns true if and only if the two Native_handle objects are the same underlying handle.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8cpp_source.html#l00080">native_handle.cpp:80</a></div></div>
<div class="ttc" id="anamespaceipc_html_aa3192e586cc45d3e7c22463bf2760f89"><div class="ttname"><a href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">ipc::Error_code</a></div><div class="ttdeci">flow::Error_code Error_code</div><div class="ttdoc">Short-hand for flow::Error_code which is very common.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00298">common.hpp:298</a></div></div>
<div class="ttc" id="aprocess__credentials_8hpp_html"><div class="ttname"><a href="process__credentials_8hpp.html">process_credentials.hpp</a></div></div>
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